Masahiro Inuiguchi Lech Polkowski Meticulous Rough Inclusion and Its Relations to Fuzzy Inclusion. 1535-1538 2001 conf/fuzzIEEE/2001 FUZZ-IEEE db/conf/fuzzIEEE/fuzzIEEE2001.html#InuiguchiP01 https://doi.org/10.1109/FUZZ.2001.1008955